QUESTION 15 Judge the following sentence according to the criteria given below: The circular orbit of wave motion returns the floating object to its exact original position BECAUSE the half orbit in the trough is at the same velocity as the crest half of the orbit.

a. The assertion and the reason are both correct, and the reason is valid.
b. The assertion and the reason are both correct, but the reason is invalid.
c. The assertion is correct, but the reason is incorrect.
d. The assertion is incorrect, but the reason is correct.
e. Both the assertion and the reason are incorrect.